1 /*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #define LOG_TAG "CameraUtils"
18 //#define LOG_NDEBUG 0
19
20 #include <camera/CameraUtils.h>
21 #include <camera/camera2/OutputConfiguration.h>
22 #include <media/hardware/HardwareAPI.h>
23
24 #include <android-base/properties.h>
25 #include <system/window.h>
26 #include <system/graphics.h>
27
28 #include <utils/Log.h>
29
30 namespace android {
31
32 const char *kCameraServiceDisabledProperty = "config.disable_cameraservice";
33
getRotationTransform(const CameraMetadata & staticInfo,int mirrorMode,int32_t * transform)34 status_t CameraUtils::getRotationTransform(const CameraMetadata& staticInfo,
35 int mirrorMode, /*out*/int32_t* transform) {
36 ALOGV("%s", __FUNCTION__);
37
38 if (transform == NULL) {
39 ALOGW("%s: null transform", __FUNCTION__);
40 return BAD_VALUE;
41 }
42
43 *transform = 0;
44
45 camera_metadata_ro_entry_t entry = staticInfo.find(ANDROID_SENSOR_ORIENTATION);
46 if (entry.count == 0) {
47 ALOGE("%s: Can't find android.sensor.orientation in static metadata!", __FUNCTION__);
48 return INVALID_OPERATION;
49 }
50
51 camera_metadata_ro_entry_t entryFacing = staticInfo.find(ANDROID_LENS_FACING);
52 if (entryFacing.count == 0) {
53 ALOGE("%s: Can't find android.lens.facing in static metadata!", __FUNCTION__);
54 return INVALID_OPERATION;
55 }
56
57 int32_t& flags = *transform;
58
59 int32_t mirror = 0;
60 if (mirrorMode == OutputConfiguration::MIRROR_MODE_AUTO &&
61 entryFacing.data.u8[0] == ANDROID_LENS_FACING_FRONT) {
62 mirror = NATIVE_WINDOW_TRANSFORM_FLIP_H;
63 } else if (mirrorMode == OutputConfiguration::MIRROR_MODE_H) {
64 mirror = NATIVE_WINDOW_TRANSFORM_FLIP_H;
65 } else if (mirrorMode == OutputConfiguration::MIRROR_MODE_V) {
66 mirror = NATIVE_WINDOW_TRANSFORM_FLIP_V;
67 }
68
69 int orientation = entry.data.i32[0];
70 if (mirror == 0) {
71 switch (orientation) {
72 case 0:
73 flags = 0;
74 break;
75 case 90:
76 flags = NATIVE_WINDOW_TRANSFORM_ROT_90;
77 break;
78 case 180:
79 flags = NATIVE_WINDOW_TRANSFORM_ROT_180;
80 break;
81 case 270:
82 flags = NATIVE_WINDOW_TRANSFORM_ROT_270;
83 break;
84 default:
85 ALOGE("%s: Invalid HAL android.sensor.orientation value: %d",
86 __FUNCTION__, orientation);
87 return INVALID_OPERATION;
88 }
89 } else {
90 // - Front camera needs to be horizontally flipped for mirror-like behavior.
91 // - Application-specified mirroring needs to be applied.
92 // Note: Flips are applied before rotates; using XOR here as some of these flags are
93 // composed in terms of other flip/rotation flags, and are not bitwise-ORable.
94 switch (orientation) {
95 case 0:
96 flags = mirror;
97 break;
98 case 90:
99 flags = mirror ^
100 NATIVE_WINDOW_TRANSFORM_ROT_270;
101 break;
102 case 180:
103 flags = mirror ^
104 NATIVE_WINDOW_TRANSFORM_ROT_180;
105 break;
106 case 270:
107 flags = mirror ^
108 NATIVE_WINDOW_TRANSFORM_ROT_90;
109 break;
110 default:
111 ALOGE("%s: Invalid HAL android.sensor.orientation value: %d",
112 __FUNCTION__, orientation);
113 return INVALID_OPERATION;
114 }
115
116 }
117
118 /**
119 * This magic flag makes surfaceflinger un-rotate the buffers
120 * to counter the extra global device UI rotation whenever the user
121 * physically rotates the device.
122 *
123 * By doing this, the camera buffer always ends up aligned
124 * with the physical camera for a "see through" effect.
125 *
126 * In essence, the buffer only gets rotated during preview use-cases.
127 * The user is still responsible to re-create streams of the proper
128 * aspect ratio, or the preview will end up looking non-uniformly
129 * stretched.
130 */
131 flags |= NATIVE_WINDOW_TRANSFORM_INVERSE_DISPLAY;
132
133 ALOGV("%s: final transform = 0x%x", __FUNCTION__, flags);
134
135 return OK;
136 }
137
isCameraServiceDisabled()138 bool CameraUtils::isCameraServiceDisabled() {
139 return base::GetBoolProperty(kCameraServiceDisabledProperty, false);
140 }
141
142 } /* namespace android */
143